Books can be a powerful source of communication, provided

Books become a powerful source of communication when their content is illustrative, showing ideas through examples and images.

Illustrative content makes abstract matter concrete and easier to grasp.

Abstract content alone tends to weaken reach, since it is harder for readers to relate to.

Restricting the medium to Hindi is not a general condition for a book's communicative power.

Good print improves legibility but does not itself make the content communicate ideas.

Illustration bridges the gap between text and the reader's understanding.